In article injuriousness of the Colorado beetle on agricultural plants is shown. Also methods of fight against this wrecker are given.
The USSR delivered on the territory last century from America (State of Colorado), this wrecker, continues to pose threat now both to weeds, and cultural plants from family of the paslenovy.
The bug winters in the soil on depth from 15 to 70 see. In the conditions of the Crimea more than 70-80 % of bugs perfectly winter, maintaining frosts – 260S and below. In vegetation the wrecker develops in three generatsiya. Process of an exit of bugs of places of wintering will stretch from one to one and a half months that causes prolixity of the period of a yaytsekladka and terms of development of the subsequent stages and generation of the wrecker.
Harm both bugs, and larvae. 100 larvae in a month destroy 80 grams, and 100 bugs for the same time – 424 grams of sheet weight of plants. Bugs can transfer quite long period of hunger strike.
Speed from which the Colorado beetle extended about the country, and his removal as wrecker from objects of internal quarantine, speaks about abilities of the wrecker to active moving and migration. In dry, warm years the Colorado beetle is capable to fly of tens and hundreds kilometers with a speed to 8 km/h.
A food and reproduction of the wrecker is directly connected with heat and humidity. At temperature below 120S egg it doesn’t postpone a larva not otrozhdayutsya, and at temperature + 38°S dries in general. Otrodivshiesya from eggs of a larva eat yaytsevy covers and bugs eat potatoes leaves, an eggplant, tomatoes, as well as. In process of a larva pass four age, pupating in the top layer of earth. It is very characteristic that during the summer period, in the presence of food and optimum weather conditions, the majority of young bugs 1 and the 2nd generation after 10-15 day, active foods go to the soil, running into a condition diapauzy. This biological feature should be considered at carrying out actions for elimination of the centers of the wrecker.
To mass distribution and injuriousness of the Colorado beetle promote not – timely protective measures, non-compliance yadooborota that causes accustoming of an insect to application of the same preparation or its analogs. That especially often meets on potatoes plantations in individual sector.
For timely and high-quality fight against the Colorado beetle it is necessary to know that are more sensitive to damage of a plant which are in a butonizatsiya phase – potatoes flowerings. During this period it is economically favorable to apply chemical means. Protection of crops of paslenovy cultures against bugs and larvae should be carried out preparations: Aktara century of, 0,06-0,08 kg/hectares; Bankol of item page, 0,2-0,3 kg/hectares; Mospilan of genitive, 0,02-0,25¬ú/hectare; Konfidor Maxi century of, 0,045-0,05¬ú/hectare; Konfidor v.r.k. 0,2-025 l/hectares and many other. Above-mentioned preparations are resolved both for industrial cultivation of potatoes, and for use in individual sector.
For more information it is necessary to address to specialists of the State station of protection of plants, Olenchuk St. 52, contact phone 63-25-78.
L.Alekseeva, main agriculturist of the State station of protection plant, S. Kindruk, manager of laboratory of forecasts and diagnostics.